Planooraph co



w. L. DAYTON] PUMP JACK.

APPLICATION FILED MAR. 20. 1918.

'1 369,843. Patented July 15, 1919.

2 SHEETS-SHEET I.

W. L. DAYTON.

PUMP JACK.

APPLICATION FILED MAR. 20, 1918.

1,309,843. Patented July 15,- 1919.

2 SHEETSSHEET 2.

avwawto'c 7 than pump-jacks,-

WILLIAM L. DAYTON,

OF FORT WORTH, TEXAS; assienoe To GRAVITY PUMP AND' POWER. do, or FORTwont-ii, TEXAs PUMP-JACK.

Specification of Letters Patent.

Patented July 15, 1919;

Application fi1e21M arch20, 1918. Serial No. 223,483.-

T 0 all whom it may concern: H

Be it known that 1, WILLI M L. DAYTON, a citizen of the United States ofAmerica,

residing at Fort WVor'th, in the county of Tarran-t and State of Texas,have lnvented certain new and useful Improvements in Pump-Jacks, ofwhich the following is a specification. v Y

My invention relates to pump-jacks and more particularly to certaingravity-acm ated means for increasing the power of the pumpjacks, andthe Object is to provide gravityactuated devices for operating. onlevers and means for causing the greatest leverage on the upstroke ofthe sucker rod and for causing the least leverage onthe down stroke ofthe sucker rod'. Another object is to proyide a power savinglattachinentfor pump-jacks or means for aiding the driving power of the pump-jacks.The

advantage is that a much smaller motor can be used to operate the pumpjack and the attachment ma be used on other devices as for well drillingIna chines. Other objects be fully explained in thefolflowingdescription and the invention will be more particularlypointed out t me claims.

Reference is had to the accompanying drawings which form a part of thisapplica tion.

Figure 1 is a side elevation-of a singleacting pum -jack providedwiththe attach ments. Fig. 2 is a plan view of the same.

Fig. 3 is a side elevation of a double-act" ing pump-jack which embodiesthe attachments shown in the revious views. Fig. 4; is a plan view ofthe same. Fig: 5 is an end elevation of the pump jacks shown in Figs. 3and A.

Similar characters of reference are used to indicate the same partsthroughout theseveral views.

The pump-jack is provided with a frame in two parts 1 and 2 which partsare substantially duplicates. Each part may be a single casting orformed of a single piece. The two frame members are connected and bracedby sleeved rods or bars 3, there being two of such bars on one end ofthe frames and three bars on the other end. The frames will also beconnected and bracedby the Operating shafts. A power wheel 1' isprovided with a shaft 5 which is journale'd in the frame members 1 and-2 and a balance and advantages will wheel 6 is mountedon shaft 5. Apinion 7 is rigid with shaft 5 and this pinion drives a cog wheel 8which is rigid with and drives thema'in crank-shaft 9. A link bar 10 ispivot'a lly connected to the crankshaft 9 and is d riven'by this shaft.The link bar 10 is to be connected to the sucker or other pull" rod. Thedrawings show a crank 11 rigid with shaft demonstrating pump 14. Thecrank 11 is connected to a link bar 12 which is connected to the suckerrod 13 of the pump 14. The crank-shaft 9 is driven by the power wheel 4through shaft 5, pinion 7 and cog wheel 8;

The gravity attachments are connected to the shaft?) and consist of alever 15 which is rigid with shaft 9 and a sliding weight 16 is mountedon thelever 15. The weight 16' is shifted on the lever 15 by means of acrank 17 and a-link bar 18 which is pivotally connected to'theweight-16' and pivotally connected to the crank 17. The crank 17 isrigid with the pivot spur pinion 20 is rigid with the bolt 19 and mesheswith and is driven by a spur pinion 21 which is rigid with frame 1. Anadjustablej weight 22 may be mounted on the lever 15 for increasing ordecreasing the power of the lever.

Upon rotation of the shaft 9 and the lever 15 carrying the pinion 20,the latter will have a planetary movement around the fixed pinion 21 andalso a rotation on its own axis due to its meshing" with the pinion 21which is fixed.

When the pump jack is in action the weight 16 will be automaticallyactuated or 9for' operating a temporary or bolt or shaft 19 and a Ashifted by the gearing 20 and 21- and the crank 171 and link bar 18. Theweight 16' is shifted toward theend of the lever 15 on the upstroke toaid in liftingtheload and shifted toward the shaft 9 when there is noneed of much power or when less power is reguired on the down strokeof'the suckerro The pump jack shown in Figs. 3 and 4 is adapted foroperating two sucker rods instead of one. The gravity attachments areduplicates of the gravity attachments previously shown. The pump-j ackis provided with two frame members 25 and 26' which may be braced byconnecting bars 27 The frames will be braced by the fulcrum bars 28 and29 and by the power shaft 30. An Off-set bearing 31 is provided on eachframe member for the power shaft 30. A power wheel 32 and a balancewheel 33 are rigid with the shaft 30.' The shaft drives pinions 34 whichare rigid therewith. .The pinions 34 drive cog wheels 35 which aremounted on shafts.

or stub shafts 36 which are provided with,

bearings 37 formed on the frame members. 25 and 26. The cog wheels 35drive or cause to be actuated walking beams 38 and 39.. The walking beam38 is connected to one wheel 35 by a pitman rod 40 and the walking beam39 is connected to the other wheel 35 by apitman rod 41 so that thewalkingbeams 38 and 39 are positively driven from the power shaft 30.The walking beams 38- and 39 may be used to drive the type of dou-- bleacting pumps which have one sucker rod running Within the other.

Means are provided for aiding the powerdriven shaft 30. Power arms orlevers 42 and 43 are rigidly mounted on the stub shafts 36 and turn withthese shafts. Slid ing weights 44 and 45 are mounted on the arms 42 and43 respectively. Pinions 46 are rigid with the frame members 25 and 26and mesh with pinions 47 which are rigid with pivot bolts or shafts 48which are journaled in the short arms of the levers 42 and 43. Cranks 49and 50- are rigid with the pivot bolts 48 and pitn an bars 51 and 52 arepivotally connected to the weights 44 and 45 and to the'cranks 49 and 50respectively. The weights 44 and 45 are shifted in the same manner asthe weight 16 is shifted. The weights 44 and 45 are shifted toward andfrom the fulcrum or stub shafts 48 by the gear wheels 46 and 47respectively. When the work ends of the walking beams 38 and 39 are attheir lowest points, the weights 44 and 45 are at their highest pointsready to aid the walking beams on the up stroke to bring up the loads.

What I claim, is,

1. A pump jack comprising a frame, a

power shaft journaled in said frame, a crank shaft journaled in saidframe and gearing for driving said crank shaft from said power shaft, asucker rod to be actu ated by said crank shaft, a lever rigid with saidcrank shaft, a slidable weight mounted shaft, a sucker rod to said crankshaft and on the pivot shaft of said crank for actuating said crank toreciprocate said weight on said bar.

2. A pump jack comprising a frame, a power shaft journaled in saidframe, a crank shaft journaled in said frame and gearing for drivingsaid crank shaft from said power be actuated by said crank shaft, andgravity attachments for aiding in driving said crank shaft consisting ofa' lever rigid with said crank shaft, a weight slidable thereon, a crankprovided with a pivot shaft journaled insaid. lever, a gear wheel rigidwith said crank shaft and a gear wheel mounted on the pivot shaft ofsaid crank and driven by the first mentioned gear wheel for actuatingsaid crank, and a link bar pivotally connected to said crank and tosaid'weight for reciprocating said weight on said lever.

3. A pump jack comprising a frame, a crank shaft journaled in saidframe, means for driving said crank shaft, and gravity attachments foraiding in driving said crank shaft consisting of a bar rigid with saidcrank shaft, a weight slidable thereon, a crank pivotally connected withsaid bar on the opposite side of said crank shaft from said weight,gearing for actuating said crank from said. crank shaft, and a link barpivotally connected to said crank and to said IBveight for reciprocatingsaid weight on said 4. A pump jack comprising a frame, a crank shaftjournaled insaid frame, means for driving said crank shaft, and gravityattachments for aiding in driving said crank shaft consisting of a barrigid with said crank shaft, a weight slidable thereon, a crankpivotally connected to said bar, gearing for actuating said crank fromsaid crank shaft, a link bar pivotally connected to said crank and tosaid weight, and an adjustable weight mounted on said bar.

In testimony whereof, I set my hand, this- 21st day of January, 1918.

WILLIAM L. DAYTON.

copies if this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

